spindles

by bagpipe71 Sat Dec 08, 2012 9:29 am

why run a drop spindle?

by Joe73 Sat Dec 08, 2012 9:45 am

To lower your car without modifying springs and changing suspension geometry. Ride quality is also better.

by bagpipe71 Sat Dec 08, 2012 9:49 am

not wanting to lower ride hight any(live where there are to many backroads)but would like to run bigger wheels,and improve ride.

by Joe73 Sat Dec 08, 2012 9:56 am

Dont mess with the spindles then. G3s can take a good size rim and tire combo on them. Put you money into some good shocks and upgrade your sway bars. Put either a 1 1/8" (pre '81 Z28) or 1 1/4" (pre '81 trans am) front bar on it. At least a stock rear bar or a nice heavier aftermarket on the rear. That will tighten everything up and wont break the bank. Definitely a nicer ride.

by bagpipe71 Sat Dec 08, 2012 10:09 am

thanks joe73 was thinking sometime of putting a 12bolt rearend in it and maybe tubular a arms but wasn't wanting to drop it any.

by Joe73 Sat Dec 08, 2012 10:15 am

12 bolt wont really get you much. If I remember correctly, our 10 bolt has a larger pinion bearing than the old 12 bolts did. If your going to be pushing BIG power then just get a 9" for it. They sell them "bolt in" for our cars. For me, I would just get a good posi unit, I like the Auburn units, and maybe some axles and slide them in. I think you'll be happy with an Auburn unit and some good gears. Makes it fun to drive.

by bagpipe71 Sat Dec 08, 2012 10:22 am

thanks again didn't know that, knew they are tough. going to try to get a little over 500hp with 3:55 gears think it would be alot of fun.

by Joe73 Sat Dec 08, 2012 11:05 am

From what I've found "fun" comes in the 9-10 range. Meaning that if you build a motor fun doesnt have to be expensive or massive horsepower. Although hp does help. I've found that if you have a car with a decent amount of hp, fun comes at the right trans and rear combo. 9-10 range comes from that combo. You take the gear ratio of first gear of your trans and multiply it by your rear gear ratio. For instance, a turbo 350 or a muncie wide ratio has a 2.52 first gear ratio. If you have your stock 2.73 rear you get 2.73 x 2.52 = 6.87. But if you take the same 2.52 trans ratio and put some 3.73 gear behind it you get 3.73 x 2.52 = 9.39. Now your in the "fun" range. My current set up is 2.52 (muncie) with 4.10 gears. So 2.52 x 4.10 = 10.33. Yes, plenty of fun there. I run 50's on the back and have no problem breaking them loose from a roll at about 25 mph. But is it streetable, yes, but no "fun" on the highway. She really screams.

So its all about the combo. IMO, alot of fun would come from a mild 350 build in the 350 hp range, a nice 700R4 trans from summit for $1000, and a 3.73 rear. That would give you overdrive in the .67 ratio range instead of the usual 1:1 range of a turbo 350 or muncie. So that would drop your rpms on the highway and be nice to cruise. But the real benefit would be the 3.06 first gear ratio. So 3.06 x 3.73 = 11.41 Now that car would launch REAL nice with that ratio but have nice manners on the highway.

Best of all, its just a bolt in. Trans harness is a 4 wire hookup that would give you a choice of lock up torque convertor or not. I like to put a switch on the dash so I can lock it up when I like.

Just my 2 cents. Good luck with it.

by bagpipe71 Sat Dec 08, 2012 11:22 am

keislerauto.com t56 5speed 3.27 1st & .68 5th with 3.55 rearend should be fun.

by Joe73 Sat Dec 08, 2012 1:28 pm

Oh yeah, that 3.27 first gear would be real fun. I thought about putting in a 5 speed but decided to keep my SS numbers matching. Although I have the original 3.42 posi rear in the garage because I came across a monte rear just redone with a weeks run time on it before the guy wrecked the car. Figure an easy swap to put the original rear back in.

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